/**
 * Last Trade API Endpoint
 * 
 * Returns details of the most recent trade
 */

import { NextResponse } from 'next/server'
import { getLastTrade } from '@/lib/database/trades'

export async function GET() {
  try {
    const trade = await getLastTrade()
    
    if (!trade) {
      return NextResponse.json({
        trade: null,
      })
    }
    
    // Format the trade data for the frontend
    // For open positions, use currentSize from Position Manager state if available
    const configSnapshot = trade.configSnapshot as any
    const positionManagerState = configSnapshot?.positionManagerState
    const currentSize = positionManagerState?.currentSize
    
    // Use currentSize for open positions (after TP1), fallback to original positionSizeUSD
    const displaySize = trade.exitReason === null && currentSize 
      ? currentSize 
      : trade.positionSizeUSD
    
    const formattedTrade = {
      id: trade.id,
      symbol: trade.symbol,
      direction: trade.direction,
      entryPrice: trade.entryPrice,
      entryTime: trade.entryTime.toISOString(),
      exitPrice: trade.exitPrice || undefined,
      exitTime: trade.exitTime?.toISOString() || undefined,
      exitReason: trade.exitReason || undefined,
      realizedPnL: trade.realizedPnL || undefined,
      realizedPnLPercent: trade.realizedPnLPercent || undefined,
      positionSizeUSD: displaySize, // Use current size for open positions
      leverage: trade.leverage,
      stopLossPrice: trade.stopLossPrice,
      takeProfit1Price: trade.takeProfit1Price,
      takeProfit2Price: trade.takeProfit2Price,
      isTestTrade: trade.isTestTrade || false,
      signalQualityScore: trade.signalQualityScore || undefined,
    }
    
    return NextResponse.json({
      trade: formattedTrade,
    })
  } catch (error) {
    console.error('Failed to fetch last trade:', error)
    return NextResponse.json(
      { error: 'Failed to fetch last trade' },
      { status: 500 }
    )
  }
}